President Joe Biden is expected to announce the nomination of Air Force Gen. Charles "C.Q." Brown Jr. to serve as the next chairman of the Joint Chiefs of Staff, making him the first African American to serve in both the Pentagon’s top military and civilian positions. Brown is a history-making fighter pilot with deep knowledge of China and is currently the commander of the Pacific Air Forces. If confirmed, he will take over from Gen. Mark Milley, who held the job during the Jan. 6, 2021, assault on the Capitol and the deadly withdrawal of U.S. troops from Afghanistan.